Dowel hole drilling jig



Feb. 6, w62 .1. L. CLEVELAND DOWEL HOLE DRILLING JIG 2 Sheets-Sheet 2Filed June 28, 1960 4 A M L@ M L L c 2 %2 in m a De Z2 L 0 2 2 2 5 3 a.j E a M ,L wz.. 2 WL 5 A I 2v @f Mr J M s m VTM INVENTOR ATTORNEYS3,019,675 DQWEL HLE DRILLING JIG James L. Cleveland, 351 Clyde Ave.,Calumet City, Ill. Filed lune 2S, 196i), Ser. No. 39,330 S Claims. (Cl.'T7-62) This invention relates to a jig for drilling dowel holes inpieces of lumber. It is primarily intended for drilling dowel holes inthe edges of window sash and doors but it is also applicable to otherpieces of lumber of comparable thickness and to cabinet work generally.

The object of the invention is to provide a jig for drilling twoparallel dowel holes at a predetermined distance art.

Another object of the present invention is to provide a jig for drillingdowel holes which is adjustable in two planes to space the holes alongthe edge of a piece of lumber from both the end and with respect to thethickness of the piece of lumber.

A further object of the present invention is to provide a jig fordrilling dowel holes which has a wide range of adjustment with respectto the end of the piece of lumber in which the holes are being drilled,so that it may be used for drilling holes in the edge of a door orwindow sash adjacent the end of the latter for dowels, and also in theedge of the door or window sash at a considerable distance from the endof the latter for hinges or latches.

Still other objects, advantages and improvements will become apparentfrom the following specification, taken in connection with theaccompanying drawings, in which:

FIGURE l is a top plan view oi the drilling jig according to the presentinvention.

FIG. 2 is an end elevational view of the drilling jig.

FIG. 3 is a longitudinal vertical sectional view, taken on the sectionline 3-3 of FlG. 1 and looking in the direction of the arrows.

FIG. 4 is a transverse vertical sectional view, taken on the sectionline 4--4 of FIG. 3 and looking in the direction of the arrows.

FlG. 5 is a detail end elevational view showing the stop plate, which isused when drilling holes in the edge of a window sash or door close tothe end of the latter.

FiG. 6 is a similar view of the elongated stop bar, which is used fordrilling holes in the edge of a window or door at a considerabledistance from the end of the latter.

FlG. 7 is a detail sectional view, taken on the section line 7-7 of FIG.6 and looking in the direction of the arrows, showing the attachment ofthe elongated drilling bar to the frame of the drilling jig.

FlG. 8 is a detail sectional View, taken on the section line 3--8 ofFIG. 3 and looking in the direction of the arrows, showing the mountingof one of the vertically adjustable blocks on one of the longitudinallyadjustable slides.

FIG. 9 is a detail isometric view of one ofthe vertically adjustableblocks.

FIG. l0 is a detail isometric view of one of the longitudinallyadjustable slides.

FIG. ll is a detail isometric view of the thrust block.

Referring now to the drawings in detail and to FIGS. i, 2. and 4 inparticular, the piece of lumber, such as the edge of a window sash ordoor in which holes are to be drilled, is shown at A. The drilling jigaccording to the present invention, includes a frame comprised in partby a rectangular vertically positioned plate ill. This plate 10 has tworectangular apertures 10a and 10c therein, which are positioned withtheir longer sides parallel to and symmetrically disposed with respectto the longitudinal center line of the plate and are separated by a web10b along the transverse center line. At its top the plate 10 has anintegral upper right angle flange 11, which is preferably curved in thearc of a circle in top plan view. The drilling jig is in part secured tothe piece of lumber A by a power screw 14, which is mounted in asuitable screw threaded hole in the upper horizontal ilange 11. At itsupper end the screw 14 has a rod 15 positioned in a diametricallylocated hole therein and this rod has enlarged ends 15a- 15a to holdsame in place. It will be obvious that by turning the rod 15 the screw14 may be rotated in the proper direction. The lower end ofthe screw 14is of inverted frusto-conical shape at 14a and this lower end isslidably received in a dove-tailed slot 16a in a thrust block 16. Thethrust block lo is adapted to rest on one surface oi the piece of lumberA.

At its bottom the plate 1% is formed with a second horizontal ange 12,which is positioned on the same side of the plate and is parallelrelationship to the upper horizontal iiange 11. This lower ange 12 alsohas two rectangular apertures 12a and 12C therein, the side walls ofwhich each have a 1 longitudinal taper. The ange is positioned with therectangular apertures 12a and 12e having their tapered sides parallel toand symmetrically disposed with respect to the longitudinal center lineof the door A, when the jig is being used for drilling dowel holes Thisstop plate has an l close to the end of the latter. elongated slot 17aalong its longitudinal center line and a right angle ange 17 b at itsouter end to facilitate gripping. A screw 18 is positioned in theelongated slot 17a in the stop plate and is received in a suitable screwthreaded hole in the vertically positioned plate 1l). The inner end ofthe stop plate abuts the end of the door or window sash A to positionthe drilling jig at some location determined by alignment ot a selectedmark on the scale 12d with the end ofthe door or window sash A.

For drilling holes in the edge of a door or window sash A a greaterdistance from the end of the latter, that is when hinges or latches areto be mounted in the edge of the door or window sash, an elongated scalebar 19, as shown in FIG. 6, is provided. This scale bar has an elongatedslot 19a, positioned symmetrically with respect to the longitudinalcenter line, and a scale 19h scribed on one tace between the slot 19a`and one side. As shown in FIG. 7, this scale is adapted to be receivedin a slot 10d in the plate 1li, which slot is positioned symmetricallythescrew 18, and the inner end is formed with right angle fingers 19d,which engage one edge of the vertically positioned plate 1li. A bolt 20is movable along the elongated slot 19a and this bolt has a squarebottom 20a and a cylindrical knurled nut Zlib. By setting the bolt 20with its transverse diameter in alignment with a selected mark on thescale 1917, and one side of the bottom 20a of the bolt abutting the endof the door or window sash A, the vertically positioned plate 1l) may beset at a desired location along the edge of the door or window sashwithin the limits of the slot 19a in the scale.

The vertically positioned plate 10 is also formed at its bottom with athird flange 13, which is horizontally aligned with the second ilange12, but on the opposite side of the plate from the latter. This latterilange has two rectangular apertures 13a and 13C therein, the side wallsof which each has a 1 longitudinal taper. The ange is positioned withthe rectangular apertures 13a 4 and 13C having their tapered sidesparallel to and sym- 25-25 by thrust exerted diametrically of the eyesand metrically dlsposed with respect to the longitudinal center acrossthe chords of the open sections of the latter ine and are separated by aweb 13b, which is positioned In use, let it be assumed that parallelholes are to be along the transverse center line of the Harige. Asuitablev drilled in the edge of a door or window sash A adjacent scale13d is scribed on the top surface of the flange be- 5 the end of thelatter for driving in dowels to hold lontween the apertures 13a and 13eand the outer side of gitudinally and transversely positioned members ofthe the flange. door or window frames together. The screw 18 isVertically positioned slides 21-21 are movable along loosened so as toleave the stop plate 17 freely slidable. the apertures 13a and 13e inthe llange 13. As shown in The plate 10 is positioned against the edgeof the door FIG. 8, these slides are comprised by a base and parallel 10or window sash A. The transverse center line between legs 21a`2la, withone of the legs having a scale 2lb the two holes is determined bysetting a preselected mark scribed tnereon The corners of the base arecut away on the scale 12d on the ange 12 in alignment with the and thebase is cut away on its transverse center line t0 end of the door orwindow sash A. e stop plate 17 fOrIIl parallel lugs 21e- 210, whichlatter are undercut is then shoved inwardly against the edge of the dooror on their side walls at 21d-21d- Also, the inner side walls l5 windowsash and the screw 18 tightened. This fixes the 0f the lugs llc-2l@ arevtapered at aPPrOXlnlatelY l spacing of the two holes to be drilled withrespect to the The slides 21-21 are mounted in Vertical position on theend of the door or window sash A. If a number 0f flange 13, with thelugs 21c-`21c being received in the doors or window sash are to havepairs of holes drilled respective apertures 13a and 13C. Short llatheaded bolts in their edges at the same distance from their endSrtlle x22 have their heads received in the slots 21d- 21d in the 2O setting ofthe stop plate 17 will remain unchanged bases of the slides 21-21.Clamping plates 23 have their throughout the drilling operation. Thepower screw 14 opposite corners cut away, for receiving the corners ofis now turned to grip the door or window sash A bel the apertures 13aand 13C ln the llange lfl, and have Centween the thrust block 16 and thelower ange 12. 1' tral holes therein for freely receiving the bolts 22.Wing Where holes are to be drilled in the edge of the door nuts 24 arereCelVed 0n the Outer ends 0f the belts 22 25 or window sash A at somedistance from the end of the and serVe t0 hold the slldes 2l`2l againstthe upper faee latter, as where hinges or latches are to be placed onand the Clarnplng Plates 2a-23 against the lOWer face 0f the edge of thedoor or window sash, the slides 21-21 the flange 133 cairying the guidetubes 29-29 are removed from the The combination of the 1 longitudinaltaper on the elongated rectangular apertures 13a and 13C in the 0f therectangular apertures 130 and 13C ln the llange l then positioned underthe window sash or door A, rewith the 1 taper on the inner side walls ofthe lugs placing the llange 12, The power screw 14 and the 21C`2l0 0nthe slides 2l-2l, PrOVlCleS fOr more easy thrust block 16 are not usedi'n this drilling operation. rnOVement 0f the Slides, after the Wingnuts 24-24 llave 35 The elongated scale bar 18 is inserted in the slot104, been loosened; also, that when the Slides 21-2i1 have with thelingers 19d- 19d on the scale bar against the been re-set and the Wingnuts 2l-24 tightened, the slides inner edge of the frame 10. The spacingof the holes Will Ime up better and be positioned at 90 to the Hanse tobe drilled from the end of the doorV or window sash 13" S is determinedby the scale 19b on the elongated bar AS SllOWIln FIGS- 2, 3 and9,Vertleally slidable blocks 40 and the bolt 2@ set in position in theelongated slot Parallel lugs 25a-25fh Wllell lugs are undercut along 45the upper face of the door or window sash A and the slots intersect thenotches 25o. The slide blocks 25-25 loosening the wing nuts 24-24 andmoving either 0r are posltwned 0n the Inner faces ef the lugs 21a-21a 50both of the vertically positioned slides 21-21 towards 0f the slldes21`21, resPeCtlVelY; With the lugs 250-25L or away from the transversecenter line, and then tighten- 25b`25b 0f tlle elarnplug 'blocks 25`25 Carnplllg Similarly, the spacings of the holes to be drilled with plates27-27, similar to the previously described clamp- *55 respect to thelongitudinal center line of the edge of the lng Plates 23, are PlacedOVer the Outer faces 0f the legs door or window sash A are determined byloosening the 21a-21a of the slides'21`21, with the cut away cornerswing nuts 28 and moving the slidable blocks 25-25 upon the clampingplates receiving the corners of the legs, ward or downward along thevertically positioned slides and the bolts 26-26 pass freely throughcentral holes in 21 21 and then tightening the wing nuts. The settingsthe Clamping Plates- Wing nuts 28`28 are received 0n 60 of theseslidable blocks are determined by the marks on the outer ends of thebolts 26-26 and serve to hold the the scale 2lb on the slides. slideblocks 25-25 against the inner faces and the clamp- Having now fullydescribed my invention, what I ing plates 27-27 against the outer facesof the parallel claim as new and useful and desire to secure by Letterslegs 21a-21a of the vertically positioned slides 21-21. Patent of theUnited States is:

A Pair 0f guide tubes 29-29 ls Provided and these 65 1. A drilling jigincluding a plate having parallel uptubes serve to direct the drillsagainst the edge ofthe door per and lower flanges on one side and alower flange on or window sash These tubes are held in place by eye theother side, a power screw mounted in a hole 1n the bolts 31)*30 whichare opened by having their free ends upper flange for engaging a pieceof lumber to be drilled spread apart from their Shanks over the arc ofapproxiagainst the first lower flange a slide member mounted for mately120. The Shanks of the eye bolts 30 are posi- 70 movement along saidsecond lower flange, a block mounttioned in the slots 25d in theslidable blocks 25 and reed for movement along said slide member, and adrillceived wing nuts 3131 on their outer threadedl ends, ing guidecarried by said block.

which nuts abut the top faces of the blocks. The eye bolts 2. A drillingjig including a plate having parallel up- 30`30 hold the guide tubes inplace against one side of per and lower flanges on one side and a lowerflange on the V shaped notches 25d-25d in the slideable blocks 75 theother side with an elongated aperture therein, a

power screw mounted in a hole in the upper llange for engaging a pieceof lumber to be drilled against the first lower flange, a slide membermounted for movement along said second lower flange and having lugsthereon received within the elongated aperture in the latter, a blocl;mounted for movement along said slide member, and a drilling guidecarried by said block.

3. A drilling jig including a plate having parallel upper and lowerflanges on one side and a lower llange on the other side, a power screwmounted in a hole in the upper llange for engaging a piece of lumber tobe drilled against the rst lower flange, a pair of slide members mountedfor movement along said second lower flange, blocks mounted for movementalong said slide members, and drilling guides carried by said blocks.

4. A drilling jig including a plate having per and lower llanges on oneside and a lower flange on the other side with a pair of elongatedapertures therein, a power screw mounted in a hole in the upper flangefor engaging a piece of lumber to be drilled against the lirst lowerllange, a pair of slide members mounted for movement along said secondlower ilange and having lugs thereon received within the apertures inthe latter, blocks mounted for movement along said slide members, anddrilling guides carried by said blocks.

parallel up- 5. A drilling jig including a plate having parallel upperand lower lianges on one side and a lower ange on the other side with apair of elongated apertures therein, a power screw mounted in a hole inthe first upper llange for engaging a piece of lumber to be drilledagainst the rirst lower flange, a pair of parallel legs and a pair oflugs thereon with slots formed complementally in said lugs, said lugsbeing received within the elongated apertures in the second lower ange,bolts mounted in said slots in the lugs and projecting through theapertures, clamping plates surrounding said bolts, nuts on said boltsengaging said clamping plates, slidable blocks mounted between the legsof said slide members and having slots in one face, bolts mounted in theslots in said slidable blocks and projecting between the legs, clampingplates surrounding said bolts, nuts on said letter bolts engaging saidletter clamping plates., eye bolts secured to said slidable blocks, andguide tubes carried by said eye bolts.

References Cited in the tile of this patent UNITED STATES PATENTS

